Cyclist helmet



FIG. 1 is a front perspective view of a cyclist helmet showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view, the right side being a mirror image thereof;

FIG. 4 is a front elevational view; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a cyclist helmet, as shown and described. 